How to make boost converter that will convert 3.8 volts to 5 volts for my android????
Asked by PavleP 3 years ago | last reply 3 years ago
I'm trying to make a remote shutter release for my large format lenses. I found a solenoid that will do the trick. It's 12v / 36 ohm push solenoid with 3/8" travel. I prefer to drive this thing with a single AA battery. Is there a simple way to boost 1.5v?
Posted by JonLoder 5 years ago | last reply 5 years ago
I am making the rwilsfor07 boost converter, I already have the timer but the mosfet isn't working; I think that didn't work but I am not sure. Should I buy another one or buy a IGBT: http://www.ebay.com/itm/IGBT-Power-transistor-FGL60N100-1000V-60A-180W-TO264-/170643487614?pt=LH_DefaultDomain_0&hash;=item27bb24fb7e#ht_2150wt_758
Asked by Kurt Gerhard 7 years ago | last reply 6 years ago
I want to boost my bluetooth dongle. On some Instructables there are mentions of getting an exactly correct length. On others the length and shape seem to be arbitrary. If I want to add more antenna to my bluetooth dongle, do I have to make it an exact length or shape?
Asked by finfan7 8 years ago | last reply 8 years ago
I need a dc-dc boost converter that will step 25.9 volts at 2600 mah up to around 388v at 360 ma will I need a battery back with a greater amp output I can get up to 12000 mah at the same voltage any suggestions I am trying to charge a .1 farad cap bank that consists of only 10 caps Any help is appreciated -TDC
Posted by ThinkDesignConstruct 4 years ago | last reply 4 years ago
So, I plugged in the USB to an iPod Mini and the whole cicuit goes blank. I tried it on some person's MINI, but the light shut off right when I switched the switch. HOWEVER, it did work on my iPod Nano and my sister's iPod Mini. It seems like the circuit is shorting out on the MINI and not on the Ipod Nano. I am thinking it is a problem with the noob sauce's MINI, but I do not know why it is shorting out and turning the light out on the charger. Thanks -Brennn10
Posted by Brennn10 11 years ago | last reply 11 years ago
To charge a cell phone battery. BUT maximum current is 200 mA. That's not enough current I'm assuming, right? I need a continuous output of 5V but my students are most likely not going to get 5V from a shake charger (neodymium magnets going in and out through a coil of wire) which is why I was going to use a LM7805 but that needs 3 volts more than the output voltage. Any suggestions?? Thank you!
Asked by mckywer 7 years ago | last reply 7 years ago
I tried this circuit using a 3.7v supply and instead of a 12v Zener I used a 5v Zener. I also used a 22uH inductor. I get 5v no load but when I add a load the voltage drops a bit and the current is 50ma max. Why is this not working and what could I change to make it work? If this is the wrong circuit altogether, then what discrete circuit would work? http://www.aaroncake.net/circuits/6-12conv.asp
Asked by Davis Lambert 3 years ago | last reply 3 years ago
Hey Guys! I want some advice regarding boost converters. I want to charge a capacitor rated for 450v 1150uF using a boost converter with input voltage >12 volts. What kind of inductor values will I need? What should be the duty cycle and frequency of the square wave generator? And is there any formula to calculate this or a calculator? Thanks in advance, IndianHacker002
Asked by IndianHacker002 2 years ago | last reply 2 years ago
Will i get more charging hours by using them?what is the maximum number of D cell batteries i can use in series to power a minty boost circuit?or how much input voltage can i give to a minty boost circuit?
Asked by imakethings 8 years ago | last reply 8 years ago
I bought a FM transmitter for an ipod. I would like to boost the range of the device. (I know it is illegal but would like to get more range than 2 feet.) I think I need to build an external antenna but need to know where to hook it up to the thing. The transmitter I have is a ge FM transmitter for ipod.If anyone has done anything like this or have any useful links it would be great. I don't know anything about circuit making so help would be great on that as well.
Posted by thejrb 10 years ago | last reply 2 years ago
Hi, I need to make a sawtooth generator based on an NE555 (the power supply will be 15 volt - 5000mA), and I need to boost the output signal as follow: http://s21.postimg.org/dwz6aynvb/Sawtooth.png Which needs to go from 9.6 volt to 14.10 volt with a 3000mA current. I've found a schematich, but I don't know if is valid: http://s27.postimg.org/9ptmbsbkz/Signal_Boost.png Would be a viable way, using this schematic, or there would be a better/different solution? If so, someone could suggest me another schematic or tell me how to modify the one which I posted? Thank you.
Asked by akopelumenuscu 3 years ago | last reply 3 years ago
I am planning to make a small boost converter similar to mintyboost. I am using a boost IC that will give me about 92% efficiency with the voltage i have. The output is 5v at 500ma, and the input voltage is 2.4v. Would the ic suck up more than 500ma per hour from the batterys?
Asked by astroboy907 8 years ago | last reply 8 years ago
I recently came to know about a "mintyboost" from "steveastrouk"( a very helpful and trusted member of instructables).It boosts up volts while bringing down amps very much like a step up transformer.Well I've got 2 AA rechargeable batteries rated 1.2 volts and 1900mAh.So here's my first question-I connect these batteries in parallel and they give out a total of 2.4 volts okay fine....but what about the amps?will they get added up like volts and produce 3800mAh current?The latter part-I need to boost this 2.4 volts to 5 volts by bringing down the amps(any value is fine as long as its above 0.7 Amps).Could you please give me a specificated instruction on how to do this?If to use a "mintyboost"what software should I use to calculate the required values and......... the rest...... Pls don't think I'm lazy.I really want to do this so badly...
Asked by Adarsh_tronix 6 years ago | last reply 6 years ago
How exactly do I hook this up? Where does ground go? Where does the Vin and Vout go? This is the circuit but we're replacing the 7805 w/ the boost regulator. Thank you!! The pic of the circuit isn't showing up - the circuit goes: Coil /w magnet connected to diode bridge to capacitor to 7805 connected to the cell phone charger. We're replacing the 7805 with the NCP1402 - do you know where it goes? Thank you!
Asked by mckywer 7 years ago | last reply 7 years ago
I've been using the mc34063 in boost converter manner to build an external battery circuit for 3.7v->5v DC-DC conversion, but within few minutes of operation the chip and the inductor begin to overheat beyond touchable (light smell of burning components too), occurring with both circuits that I had. I've tested using the following devices: ipod touch 2G, ipod touch 5G, kross g6 tablet, all of which had the circuit overheat. The power source is 4 cylindrical cells in parallel @ 3.8v ~9A with protection circuit. The batteries do not overheat and I'm guessing the protection circuit regulates the current to an extent. I've tested the current draw of the ipod 5G to 100mA while the circuit is wired for 500mA. This is what the schematic looks like: http://www.eeworld.com.cn/uploadfile/dygl//201210/20121025102243965.png I would like some help in troubleshooting the overheating of the circuit, Thank you.
Asked by Ahyku 4 years ago | last reply 4 years ago
Sir, I am Anand from india, I will made a project based on bicycle. I have take 5 to 80v From my Bicycle pedals. Generator power is in AC 3-Phase. I want to made next step. in this I want to this 3-Phase AC 5 to 80V are constant At 48V DC. I put the 4 batteries in series. 12V 20Ah battery I use. I want to charge this batteries please help me. Thank you.
Posted by AnandC10 2 years ago | last reply 2 years ago
Hi, brought two boost buck converters to build a bench power supply from a atx psu. Brought the LM version first as i have read previously that these are quite efficient, then seen the LTC one, so thought i might as well buy that as well. Looks like the LTC board will be able to go down to lower voltages and appears to have a greater efficiency, quoted up too 98%, compared with the LM's at around 80%. Thou i understand that with adjustments changes efficncey. LM2577S LM2596S http://www.ebay.co.uk/itm/281777880409?_trksid=p2057872.m2749.l2649&ssPageName;=STRK%3AMEBIDX%3AIT LTC3780 http://www.ebay.co.uk/itm/332009159315?_trksid=p2057872.m2749.l2649&ssPageName;=STRK%3AMEBIDX%3AIT Which one do you think i should use? Regards
Posted by JonathanM221 1 year ago | last reply 1 year ago
I am looking for any kind of information that would assist me in building a DC boost converter. I understand how a DC boost converter works but don't know the math behind it so I am unclear about the types of capacitors, transistors, inductors etc I would need. Any help in how to calculate these values or how to build this circuit would be great! Thank you.
Asked by mezi24 8 years ago | last reply 8 years ago
"home" amplifiers are relatively easy to find. A simililar amp can be built from available (velleman) kits, or from discrete components. But for portable use (on the bicycle, or car) , with one, or max. two 12 V batteries, only ready made car amps are available. The only thing between the choice of using stuff I already have or buying car sound system components is the power required... Which would mean there is a circuit inside the car amplifier boosting the battery voltage... Can anyone suggest a simple circuit or easily available gadget to boost the 12 V car battery voltage to the required +- 9 up to +- 40 V required for the variation of designs available. I am thinking of using (X2) the 200 W Velleman kit (+- 30 V) or the TDA 7294 chip (+- 40 V) for my bike amp, but would also like to know how to boost to arbitrary values (like, 17, or +- 21V) (for understanding). Of course, not just voltage, but also power is needed here!
Asked by BobS 8 years ago | last reply 8 years ago
How can I boost my broadband access from my usb modem? I am about 2 mi from nearest cell tower and I'm getting about 2 bars of national access to about 2 bars of broadband access (slow to medium speed). When I am in town by towers I get full 4 bars of broadband, (speed is phenomenal!) Is there anyway to boost my signal from home? Can I "ghetto" rig an antenna wire from usb modem antenna to the tv antenna on top of house? Any help appreciated... I have the USB720 modem from Verizon, and a new Dell Inspiron 1520 loaded with Windows Vista. Attached is modem specs from Verizon wireless. Thanx, The Revelator P.S. Hardline/fiber optics is not an option here, only cell phone access at house.
Posted by revelator 10 years ago | last reply 10 years ago
Can i plug the minty boost in to my laptop to recharge the batteries or do i have to put new batteries in every time. if not how do you make it usb rechargeable?
I really want better wifi and I don't want to go out and buy something. I want to make it with house hold items or an overall price of $5 or less.
Asked by iLove Apple 9 years ago | last reply 9 years ago
Output should be within acceptable voltages of a 5V/1A regulator. What would the schematic look like?
Asked by freezeface 9 years ago | last reply 9 years ago
Hello. First time question-poser. I need really basic information (no freaky-tech-talk, please). How do I summarize? Dial-up, broadband through cell phone provider, DSL ( although discovered our location is too far out), and now satellite internet through Hughesnet. Iffy at best. Here is my dilemma: I need to boost the satellite internet signal for my laptop that will be located in my new handy-dandy office (when it is finallly constructed: a month or so) on the back of the property? Haven't measured the distance but more than a hop, skip, and jump. More like 100 hops, skips, and jumps. May have old Dish dish as was a suggestion on a page that I can't get back to now that I am officially a member, thank you very much. I know way more about this internet thing than I want and not enough to help my situation. Any suggestions would be greatly appreciated.
Asked by mimsk 7 years ago | last reply 7 years ago
Hello, I want to ask about your opinions about my websites forum (not mine per say but my good friends), http://yowee.netai.net My friend, the admin, hydronator, is considering taking the site down because we dont get much traffic, and no-one other than a few of the members of the old forum which crashed, have joined the new forum. I want to know, what could be done to improve the site, and also, what would be a better way to describe the forum, other than "fun weapons designing ", since that doesnt exactly sound right, at yowee i and a few others design things that might be considered weapons, like potato launchers or pen catapults , things that you wouldnt call toy weapons. anyway, we need a positive way to describe what we do, as well as ways to attract more traffic, or else hydronator is going to shut down the site :( because he is depressed, and is being rather negative in turn of recent events. Basically what yowee is, or what it was originally was " a community of friends having fun conspiring against society and plotting fun ways to have fun ,prank and be a nuisance" somewhat like anarchist community in many ways, except completely different, not being anarchists and all. Its hard to describe, which is one of the reason ide like to ask for help!
Posted by oldmanbeefjerky 7 years ago
Hello! I'm new here. I would like some assistance in designing a digital LED display vacuum/boost gauge with both a linear LED display as well as two seven-segment display modules. I plan to use a standard automotive MAP sensor to provide the -30Hg to +30psi signal. What I envision is having the two seven-segment displays sit next to a row of 28 green LEDs for vacuum to -28Hg, 7 yellow LEDs for pressure from +1psi to +7psi, and 8 red LEDs for pressure from 8psi to +15psi that light up incrementally as the pressure increases or vacuum increases from a center point of zero (clear LED always on). The problem is that I have absolutely NO idea of where to start other than the layout of the LEDs. So any help would be appreciated. Thanks! Skullmaster20 (Chris) Edit ----- This is a drawing of what I'm trying to create, and a picture of what I'm going to replace.
Asked by skullmaster20 8 years ago | last reply 8 years ago
Planning on a trip to Northern Maine, and I do not think "hotspots" will be crawling out of the woods. Ok, I'll cut the cliches. Within reason $$ wise, what can I do? directional boost? Thanks i am sure this is a no brainer for a brainer. Had to. Chas
Asked by Charllenger 8 years ago | last reply 8 years ago
Just gota new netbook (Advent 4213) that has built in HSDPA (ie, a sim card slot for mobile internet). My problem is that where I work there is a very weak signal - I've looked at a couple of antennas, but there's no socket in the netbook to plug one in! The inbuilt antenna is on the bottom. Can anyone recommend a way to non-permanently attatch something, like velcro, etc, to boost the signal? It's just info on what sort of connection I could use. Thanks in advance!
Asked by Coz_UK 9 years ago | last reply 8 years ago
I have a linksys Wireless N router which doesnt seem to have the power needed to reach all corners of my house... It also has no antennas (and i don't have money at all so a wifi usb thing isnt an option) so none of the guides here about wifi boosting dont really work. So i had an idea about how to fix this but had no idea how to implement it.... Here's my idea: build some sort of relay station to extend the range R=router @=relay L=Laptop )=signal R) ) ) ) ) ) ) ) ) ) ) ) ) ) @ ) ) ) ) ) ) ) ) ) ) ) ) L Is this possible? I have an old linksys router with two antennas if that helps
Asked by quellek2 8 years ago | last reply 8 years ago
How to boost the wifi range of a nintendo ds?
Asked by treinengek 9 years ago | last reply 9 years ago
I will need and antenna to boost the reception of my cell
So I have this idea to put an Ipod into an old CD player case to make the ultimate Ipod Pod. I want to use the Minty boost for battery charging, but I would also like to use a DPDT switch to switch between the DC power of the batteries to AC power of 4.5 volts. I tried to research this and came up with a plan, but I'm not sure if this would work.
Posted by fresh1 9 years ago | last reply 9 years ago
Hi. I am a student who yearly participates in a solar boat regatta, and is wondering how he can boost his panel's rate of energy... collection. I have thought of trying reflectors, and am wondering if this would work. anyone know, or have a better idea?
Posted by DELETED_craz meanman 10 years ago | last reply 10 years ago
Until just a few years ago, doctors believed that the brain stopped making new neural connections - meaning that the memory began to get irreversibly worse - when the body stopped developing, usually in the early 20s. And doctors knew that, like any other part of the body, neurons weaken as people age. Loss of brain function due to neural breakdown was assumed to be a normal, unavoidable part of aging. It turns out they were wrong.In the past few years, it has become clear that you can, in fact, make new neurons starting in your 20s and continuing well into old age. You can literally rewire the brain with new parts as the older parts wear out. How?There are lots of things you can do right now to preserve, protect and enhance your gray matter.14 Ways to Boost Brain Power
Posted by Keith-Kid 10 years ago | last reply 10 years ago
I need to power two stepper motors off of 7.4VDC, and am trying to figure out the best, most cost efficient way. What type of DC booster circuit would be best for this application? Do I need any noise filter? If yes, what kind? If I understand correctly, Stepper motors need a constant current. Does this limit my selection of DC boosters/step up devices?
Asked by RocketPenguin 2 years ago | last reply 2 years ago
Hey everyone. Recently I went to The reject store (like a dollar store where things an cost over a dollar) and saw some garden lights selling for $2 each. I bought 4 of them. :D they come with one AAA battery each with 1.2V could I Purchase a mintyboost and modify the lights so they each charge up a set of four AAA batteries, with can detach and be used to charge USB device with the internal battery storage that was charged by the solar panels, or would it have to be 2 AA's? Thanks for the help! :D
Posted by Felixninja 6 years ago | last reply 6 years ago
I have a 20 year old van. The a/c leaked and it is much cheaper to buy a 120v window unit ($140 with a 3-year walk-in exchange warranty) than to pay a shop to rebuilt the vehicle a/c. I chose a 5k BTU window unit that uses 4.1 amps running, and have a 1k watt sine wave inverter. Alone, the inverter will not start the a/c unit, but will power the fan. I confirmed a trick to start motors with an inverter. I connected an 8" bench grinder to the inverter and started it. It took a few restarts to get it up to speed. Then I started the a/c and it ran without problems. The bench grinder motor was able to supply the reactive power the a/c compressor needed to start. Both continued to run without straining the van's alternator. BUT, I don't want to travel with a running bench grinder going, that's not safe. Is there another way to supply the reactive boost that is safe to travel with? Once I get a simple stable way to run the a/c I'll work on a mount to vent the hot side. The van has sliding windows.
Posted by DavidN71 3 years ago
I'm building a circuit that would run off roughly 7v and convert it to 12v using the LM2577 (LINK). the datasheet (LINK) provides an example circuit that will output 12v @ 800mA. I need a little more power than that. around 1.25 A. my question is that if the 100mH inductor was replaced with a larger one. say a 150mH one, would that increase the current output? i would also replace the 680uF cap with a bigger one to reduce ripple. FYI the LM2577 is rated to convert 3.5v-40v to 12v. any information or direction would be appreciated picture is from the national semiconductor datasheet page 3
Asked by stapler117 8 years ago | last reply 8 years ago
Hi all, Here I have a small and simple FM transmitter based on a simple transistor oscillator, however, due its simplicity, is weak for my needs: I need to transmit the signal to a distance of about 33 feet. Notice that I will use the transmitter in a rural location and around the building there are no other houses, so I will avoid the risk to cause interferences to other people. Well, so I was thinking to implement an amplification stage, after the transmitter, and I ended up with the following schematic: http://s23.postimg.org/5o8kycjrv/Oscillator_and_Amplifier.png On the base of Q1 I have a female jack where i get the audio signal from an MP3 player. However I have some doubts about resistors values for the amp stage: these values seems too much great to me: I get the Transistor values (BFR36) from the datasheet: http://www15.zippyshare.com/d/nmSyQm6e/625003/BFR36.pdf and I calculated the values here http://www.vk2zay.net/calculators/transistors/bjtBiasing.php (choosing "desing given emitter voltage") The power supply, as shown in the schematic will be equal to 12 V DC. But as I've said I'm not very convinced of resistors values for the amp stage, which seems too much greats. On the other hand, due to the fact that the amp stage is an emitter follower, it will just amplify the current and not the voltage: would be able to give a decent boost on the signal output? What I can expect? Thanks.
Asked by akopelumenuscu 2 years ago | last reply 2 years ago
That way I will have an antenna thats 50metres long
I have torroids from pc power supply units, loads of transistors, 555s, uControllers, diodes, caps... all sorts of stuff.
Asked by yaly 4 years ago | last reply 4 years ago
Hi all, I just bought the Smartlab: You Build It - Rock Star Microphone toy from a Goodwill. It's a great toy; it has a microphone that let's me transmit my voice over the radio (perfect for a Halloween haunted house when the static-mad radio bursts to life with terrifying voice-overs!!!:) works but only up to about a six foot range. I would like to be in a different room and use the microphone but I need to boost the range considerably - I understand that the FCC has rules about this. Moving forward, I don't know how to do this (at all....). Are there commercial range boosters that I can use? Are there mods that someone can recommend? Are these toys designed to NOT transmit beyond six feet even with mods? I wish I could give more information about the tech specs of the toy but I will have to try to de-solder the metal plate covering the circuit board (plus I don't know what specs to look for yet). Advice appreciated, DAZU
Posted by damianzuch 7 years ago | last reply 7 years ago